获取系统的相关信息

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Properties;
import java.util.Set;

public class TestSystemProperties {

public static void main(String [] args){
      InetAddress netAddress = getInetAddress();
      System.out.println("host ip:" + getHostIp(netAddress));
      System.out.println("host name:" + getHostName(netAddress));
      Properties properties = System.getProperties();
      Set<String> set = properties.stringPropertyNames(); //获取java虚拟机和系统的信息。
      for(String name : set){
          System.out.println(name + ":" + properties.getProperty(name));
      }
  }


  public static InetAddress getInetAddress(){

try{
          return InetAddress.getLocalHost();
      }catch(UnknownHostException e){
          System.out.println("unknown host!");
      }

     

return null;

  }


  public static String getHostIp(InetAddress netAddress){
      if(null == netAddress){
          return null;
      }
      String ip = netAddress.getHostAddress(); //get the ip address
      return ip;
  }


  public static String getHostName(InetAddress netAddress){
      if(null == netAddress){
          return null;
      }
      String name = netAddress.getHostName(); //get the host address
      return name;
  }

}